ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,749,743, issued on Sept. 29, was assigned to NINGDE AMPEREX TECHNOLOGY Ltd. (Ningde City, China).
"Button cell" was invented by Bangbang He (Ningde City, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A button cell includes a packaging member and an electrode assembly. The packaging member includes an insulating wall, a first end cover, and a second end cover. The insulating wall is provided with a through accommodating cavity, and the first end cover and the second end cover are arranged at two ends of the accommodating cavity, respectively. The insulating wall is further provided with a first communication hole for communication between the acc...